Linked Life Data

2631567

Source:http://linkedlifedata.com/resource/pubmed/id/2631567

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1990-5-1
pubmed:abstractText
Chromatographic-spectrophotometric methods for the determination of vitamins K1, K3 and K4 in pharmaceuticals (tablets, dragees, injection solutions) in the presence of decomposition products have been elaborated. The TLC method on Kieselgel HF 254 (Merck) was applied to separation of the active substances from decomposition products, using the following solvent systems: benzene--ethyl acetate (9:1) for vitamin K1, cyclohexane--chloroform--metanol--acetic acid (2:15:3:1) for vitamin K3, and benzene--acetone (9:1) for vitamin K4. After elution from the plates, vitamin K1 was determined in ethanol at lambda = 251 nm, vitamin K3 in water at lambda = 234 nm and vitamin K4 in methanol at lambda = 225 nm. Maximum sensitivity of the elaborated methods came up to 7 X 10(-5) g, and standard deviations of single determinations ranged from 1.99% to 3.70%.
pubmed:language
pol
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0001-6837
pubmed:author
pubmed:issnType
Print
pubmed:volume
46
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
138-45
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1989
pubmed:articleTitle
[Analysis of the products of drug decomposition. XLII. Determining the levels of vitamin K in pharmaceutical preparations in the presence of decomposition products].
pubmed:publicationType
Journal Article, Comparative Study, English Abstract